/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/mapavg2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:43:58,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:43:58,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:43:58,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:43:58,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:43:58,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:43:58,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:43:58,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:43:58,201 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:43:58,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:43:58,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:43:58,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:43:58,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:43:58,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:43:58,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:43:58,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:43:58,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:43:58,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:43:58,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:43:58,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:43:58,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:43:58,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:43:58,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:43:58,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:43:58,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:43:58,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:43:58,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:43:58,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:43:58,297 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:43:58,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:43:58,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:43:58,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:43:58,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:43:58,357 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:43:58,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:43:58,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:43:58,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:43:58,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:43:58,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:43:58,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:43:58,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:43:58,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:43:58,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:43:58,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:43:58,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:43:58,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:43:58,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:43:58,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:43:58,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:43:58,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:43:58,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:43:58,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:43:58,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:43:58,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:43:58,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:43:58,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:43:58,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:43:58,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:43:58,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:43:58,865 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:43:58,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg2.i [2020-12-23 00:43:58,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10fcea6ac/73764ef5a71546dd8ae572ad0cc902a0/FLAG44b9aee44 [2020-12-23 00:43:59,519 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:43:59,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg2.i [2020-12-23 00:43:59,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10fcea6ac/73764ef5a71546dd8ae572ad0cc902a0/FLAG44b9aee44 [2020-12-23 00:43:59,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10fcea6ac/73764ef5a71546dd8ae572ad0cc902a0 [2020-12-23 00:43:59,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:43:59,876 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:43:59,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:43:59,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:43:59,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:43:59,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:43:59" (1/1) ... [2020-12-23 00:43:59,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37131f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:43:59, skipping insertion in model container [2020-12-23 00:43:59,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:43:59" (1/1) ... [2020-12-23 00:43:59,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:43:59,917 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[999]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:44:00,093 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg2.i[1313,1326] [2020-12-23 00:44:00,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:44:00,107 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[3996],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:44:00,134 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg2.i[1313,1326] [2020-12-23 00:44:00,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:44:00,155 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:44:00,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00 WrapperNode [2020-12-23 00:44:00,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:44:00,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:44:00,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:44:00,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:44:00,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:44:00,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:44:00,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:44:00,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:44:00,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... [2020-12-23 00:44:00,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:44:00,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:44:00,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:44:00,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:44:00,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:44:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:44:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:44:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:44:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:44:00,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:44:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:44:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:44:00,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:44:00,848 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:44:00,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:44:00 BoogieIcfgContainer [2020-12-23 00:44:00,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:44:00,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:44:00,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:44:00,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:44:00,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:43:59" (1/3) ... [2020-12-23 00:44:00,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe8dc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:44:00, skipping insertion in model container [2020-12-23 00:44:00,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:00" (2/3) ... [2020-12-23 00:44:00,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe8dc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:44:00, skipping insertion in model container [2020-12-23 00:44:00,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:44:00" (3/3) ... [2020-12-23 00:44:00,868 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg2.i [2020-12-23 00:44:00,880 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:44:00,887 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:44:00,910 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:44:00,958 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:44:00,960 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:44:00,960 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:44:00,961 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:44:00,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:44:00,961 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:44:00,961 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:44:00,961 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:44:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 00:44:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:44:00,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:00,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:00,993 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:01,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2020-12-23 00:44:01,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:01,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582922905] [2020-12-23 00:44:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582922905] [2020-12-23 00:44:01,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:44:01,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:44:01,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922775252] [2020-12-23 00:44:01,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:01,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:01,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:01,353 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-23 00:44:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:01,431 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-12-23 00:44:01,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:01,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:44:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:01,449 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:44:01,449 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:44:01,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:44:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 00:44:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:44:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:44:01,495 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-12-23 00:44:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:01,495 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:44:01,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:44:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:44:01,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:01,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:01,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:44:01,498 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2020-12-23 00:44:01,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:01,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232554509] [2020-12-23 00:44:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:01,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232554509] [2020-12-23 00:44:01,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606983880] [2020-12-23 00:44:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:01,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:44:01,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:01,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:01,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501502337] [2020-12-23 00:44:01,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:01,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:01,859 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-12-23 00:44:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:01,954 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:44:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:01,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:44:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:01,958 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:44:01,958 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:44:01,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:44:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 00:44:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:44:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 00:44:01,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-12-23 00:44:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:01,980 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 00:44:01,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 00:44:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:44:01,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:01,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:02,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:44:02,189 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2020-12-23 00:44:02,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:02,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603788773] [2020-12-23 00:44:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:44:02,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603788773] [2020-12-23 00:44:02,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740203570] [2020-12-23 00:44:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:02,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:02,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:02,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:02,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792570691] [2020-12-23 00:44:02,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:02,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:02,374 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-12-23 00:44:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:02,388 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 00:44:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:02,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 00:44:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:02,390 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:44:02,390 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:44:02,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:44:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 00:44:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:44:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 00:44:02,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-12-23 00:44:02,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:02,396 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 00:44:02,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 00:44:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:44:02,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:02,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:02,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:02,614 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:02,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2020-12-23 00:44:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:02,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193654669] [2020-12-23 00:44:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:02,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193654669] [2020-12-23 00:44:02,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203471073] [2020-12-23 00:44:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:02,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:02,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:02,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:44:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749422013] [2020-12-23 00:44:02,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:44:02,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:44:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:02,858 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-23 00:44:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:02,883 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-23 00:44:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:44:02,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 00:44:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:02,885 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:44:02,885 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:44:02,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:44:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:44:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:44:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 00:44:02,891 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2020-12-23 00:44:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:02,891 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 00:44:02,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:44:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 00:44:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:44:02,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:02,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:03,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,107 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2020-12-23 00:44:03,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:03,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427486350] [2020-12-23 00:44:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427486350] [2020-12-23 00:44:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477354232] [2020-12-23 00:44:03,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:03,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:03,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:03,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:44:03,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048035027] [2020-12-23 00:44:03,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:44:03,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:03,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:44:03,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:44:03,340 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-23 00:44:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:03,478 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-12-23 00:44:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:03,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-23 00:44:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:03,482 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:44:03,483 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:44:03,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:44:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:44:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-12-23 00:44:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:44:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-23 00:44:03,495 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-12-23 00:44:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:03,495 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-23 00:44:03,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:44:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-23 00:44:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:44:03,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:03,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:03,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,705 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2020-12-23 00:44:03,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:03,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285096773] [2020-12-23 00:44:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:03,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285096773] [2020-12-23 00:44:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005314042] [2020-12-23 00:44:03,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:44:03,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:03,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:03,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:04,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:04,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:44:04,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522068521] [2020-12-23 00:44:04,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:44:04,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:04,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:44:04,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:44:04,036 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-12-23 00:44:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:04,125 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-23 00:44:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:44:04,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 00:44:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:04,126 INFO L225 Difference]: With dead ends: 81 [2020-12-23 00:44:04,126 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:44:04,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:44:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:44:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-23 00:44:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:44:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-23 00:44:04,135 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-12-23 00:44:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:04,135 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-23 00:44:04,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:44:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-23 00:44:04,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:44:04,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:04,137 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:04,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:44:04,352 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:04,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2020-12-23 00:44:04,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:04,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366146670] [2020-12-23 00:44:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:04,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366146670] [2020-12-23 00:44:04,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835346274] [2020-12-23 00:44:04,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:04,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:04,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:04,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:04,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:44:04,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178910234] [2020-12-23 00:44:04,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:44:04,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:04,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:44:04,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:44:04,672 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-12-23 00:44:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:04,706 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-23 00:44:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:04,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:44:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:04,710 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:44:04,710 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:44:04,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:44:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:44:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:44:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:44:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-23 00:44:04,733 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2020-12-23 00:44:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:04,734 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-23 00:44:04,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:44:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-23 00:44:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:44:04,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:04,742 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:04,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,958 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:04,959 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2020-12-23 00:44:04,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:04,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072825819] [2020-12-23 00:44:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:05,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072825819] [2020-12-23 00:44:05,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256099814] [2020-12-23 00:44:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:44:05,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:05,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:44:05,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:05,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 00:44:05,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978297297] [2020-12-23 00:44:05,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:05,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:05,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:05,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:05,346 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-12-23 00:44:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:05,496 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-12-23 00:44:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:05,496 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-12-23 00:44:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:05,497 INFO L225 Difference]: With dead ends: 97 [2020-12-23 00:44:05,497 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:44:05,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:44:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-23 00:44:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:44:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 00:44:05,505 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-12-23 00:44:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:05,505 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 00:44:05,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 00:44:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:44:05,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:05,507 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:05,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,722 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2020-12-23 00:44:05,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:05,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677836502] [2020-12-23 00:44:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:44:05,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677836502] [2020-12-23 00:44:05,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043498797] [2020-12-23 00:44:05,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:44:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:06,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:06,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:44:06,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037766499] [2020-12-23 00:44:06,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:06,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:06,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:06,019 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-12-23 00:44:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:06,104 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-12-23 00:44:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:06,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-23 00:44:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:06,105 INFO L225 Difference]: With dead ends: 105 [2020-12-23 00:44:06,105 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:44:06,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:44:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-12-23 00:44:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:44:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-23 00:44:06,112 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2020-12-23 00:44:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:06,112 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-23 00:44:06,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-23 00:44:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:44:06,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:06,114 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:06,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:44:06,328 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2020-12-23 00:44:06,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:06,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639931314] [2020-12-23 00:44:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:06,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639931314] [2020-12-23 00:44:06,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332955215] [2020-12-23 00:44:06,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:06,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:06,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:44:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946706457] [2020-12-23 00:44:06,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:44:06,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:06,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:44:06,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:44:06,659 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2020-12-23 00:44:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:06,694 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-23 00:44:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:44:06,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-12-23 00:44:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:06,695 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:44:06,695 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:44:06,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:44:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:44:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 00:44:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:44:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-23 00:44:06,702 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2020-12-23 00:44:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:06,702 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-23 00:44:06,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:44:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-23 00:44:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:44:06,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:06,704 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:06,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:06,918 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:06,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2020-12-23 00:44:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:06,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625745540] [2020-12-23 00:44:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:07,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625745540] [2020-12-23 00:44:07,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120661374] [2020-12-23 00:44:07,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:07,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:07,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:07,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:07,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:44:07,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858863194] [2020-12-23 00:44:07,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:07,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:07,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:07,205 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2020-12-23 00:44:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:07,259 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-23 00:44:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:44:07,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-23 00:44:07,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:07,261 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:44:07,261 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 00:44:07,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 00:44:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 00:44:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:44:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-23 00:44:07,267 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2020-12-23 00:44:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:07,267 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-23 00:44:07,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-23 00:44:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:44:07,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:07,268 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:07,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:07,483 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2020-12-23 00:44:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:07,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099700025] [2020-12-23 00:44:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:07,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099700025] [2020-12-23 00:44:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765358063] [2020-12-23 00:44:07,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:07,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:44:07,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:07,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:07,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:44:07,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:07,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:44:07,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445035340] [2020-12-23 00:44:07,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:44:07,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:07,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:44:07,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:07,999 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2020-12-23 00:44:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:08,082 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-12-23 00:44:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:08,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-12-23 00:44:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:08,084 INFO L225 Difference]: With dead ends: 115 [2020-12-23 00:44:08,084 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:44:08,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:44:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-12-23 00:44:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:44:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-23 00:44:08,090 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2020-12-23 00:44:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:08,090 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-23 00:44:08,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:44:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-23 00:44:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:44:08,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:08,092 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:08,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:44:08,306 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2020-12-23 00:44:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:08,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981676910] [2020-12-23 00:44:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:08,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981676910] [2020-12-23 00:44:08,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315535267] [2020-12-23 00:44:08,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:08,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:08,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:44:08,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:08,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:08,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:44:08,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779388626] [2020-12-23 00:44:08,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:44:08,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:08,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:44:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:08,640 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2020-12-23 00:44:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:08,689 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-12-23 00:44:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:44:08,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-12-23 00:44:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:08,691 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:44:08,691 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:44:08,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:44:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-23 00:44:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:44:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-12-23 00:44:08,699 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2020-12-23 00:44:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:08,699 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-12-23 00:44:08,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:44:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-12-23 00:44:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:44:08,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:08,700 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:08,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:44:08,914 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2020-12-23 00:44:08,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:08,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395283366] [2020-12-23 00:44:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:09,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395283366] [2020-12-23 00:44:09,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433478334] [2020-12-23 00:44:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:09,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:44:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:44:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:09,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:09,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:44:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840954571] [2020-12-23 00:44:09,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:44:09,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:44:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:44:09,428 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2020-12-23 00:44:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:09,493 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-12-23 00:44:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:44:09,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-12-23 00:44:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:09,495 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:44:09,495 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:44:09,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:44:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:44:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-23 00:44:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:44:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-23 00:44:09,500 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2020-12-23 00:44:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:09,501 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-23 00:44:09,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:44:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-23 00:44:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:44:09,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:09,502 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:09,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:44:09,716 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2020-12-23 00:44:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:09,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197554299] [2020-12-23 00:44:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:09,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197554299] [2020-12-23 00:44:09,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038278191] [2020-12-23 00:44:09,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:10,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:44:10,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:44:10,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:10,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-23 00:44:10,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165632126] [2020-12-23 00:44:10,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:10,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:10,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:10,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:10,487 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2020-12-23 00:44:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:10,592 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-12-23 00:44:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:10,592 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-12-23 00:44:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:10,594 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:44:10,594 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:44:10,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:44:10,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-12-23 00:44:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:44:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 00:44:10,607 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2020-12-23 00:44:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:10,608 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 00:44:10,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 00:44:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:44:10,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:10,609 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:10,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:10,823 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2020-12-23 00:44:10,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:10,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579347743] [2020-12-23 00:44:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:11,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579347743] [2020-12-23 00:44:11,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607078192] [2020-12-23 00:44:11,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:11,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:44:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:11,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:11,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:44:11,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978030796] [2020-12-23 00:44:11,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:44:11,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:11,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:44:11,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:44:11,237 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2020-12-23 00:44:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:11,304 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-23 00:44:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:11,304 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-12-23 00:44:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:11,305 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:44:11,306 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 00:44:11,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:44:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 00:44:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-23 00:44:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:44:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-23 00:44:11,310 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2020-12-23 00:44:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:11,311 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-23 00:44:11,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:44:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-23 00:44:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:44:11,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:11,312 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:11,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:44:11,527 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2020-12-23 00:44:11,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:11,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936444918] [2020-12-23 00:44:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936444918] [2020-12-23 00:44:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406259700] [2020-12-23 00:44:11,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:11,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:11,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:44:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:11,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:11,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:44:11,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975373064] [2020-12-23 00:44:11,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:44:11,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:44:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:44:11,931 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-12-23 00:44:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:11,992 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-23 00:44:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:44:11,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-12-23 00:44:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:11,993 INFO L225 Difference]: With dead ends: 130 [2020-12-23 00:44:11,994 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:44:11,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:44:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:44:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:44:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:44:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-23 00:44:11,998 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2020-12-23 00:44:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:11,999 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-23 00:44:11,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:44:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-23 00:44:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:44:12,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:12,000 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:12,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:44:12,215 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2020-12-23 00:44:12,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:12,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391643010] [2020-12-23 00:44:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391643010] [2020-12-23 00:44:12,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243605727] [2020-12-23 00:44:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:12,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:44:12,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:12,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:12,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 00:44:12,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:12,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:44:12,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151649085] [2020-12-23 00:44:12,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:12,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:12,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:12,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:12,794 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2020-12-23 00:44:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:13,002 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-12-23 00:44:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:13,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2020-12-23 00:44:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:13,003 INFO L225 Difference]: With dead ends: 141 [2020-12-23 00:44:13,003 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:44:13,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:44:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-23 00:44:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:44:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-23 00:44:13,010 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2020-12-23 00:44:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:13,010 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-23 00:44:13,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-23 00:44:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:44:13,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:13,011 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:13,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:44:13,226 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2020-12-23 00:44:13,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:13,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432418846] [2020-12-23 00:44:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432418846] [2020-12-23 00:44:13,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713467560] [2020-12-23 00:44:13,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:13,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:13,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:13,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:44:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:13,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:13,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:44:13,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268363262] [2020-12-23 00:44:13,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:13,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:13,757 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2020-12-23 00:44:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:13,864 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-12-23 00:44:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:44:13,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-12-23 00:44:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:13,865 INFO L225 Difference]: With dead ends: 146 [2020-12-23 00:44:13,865 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:44:13,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:44:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-23 00:44:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:44:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-23 00:44:13,870 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2020-12-23 00:44:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:13,870 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-23 00:44:13,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-23 00:44:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:44:13,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:13,874 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:14,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:14,088 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2020-12-23 00:44:14,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:14,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220851425] [2020-12-23 00:44:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:14,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220851425] [2020-12-23 00:44:14,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880574515] [2020-12-23 00:44:14,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:15,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:44:15,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:44:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:15,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:15,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:44:15,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80754467] [2020-12-23 00:44:15,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:44:15,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:15,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:44:15,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:15,387 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-12-23 00:44:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:15,452 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-12-23 00:44:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:15,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-23 00:44:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:15,454 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:44:15,454 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:44:15,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:44:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:44:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:44:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-23 00:44:15,460 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2020-12-23 00:44:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:15,460 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-23 00:44:15,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:44:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-23 00:44:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:44:15,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:15,461 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:15,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:15,676 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2020-12-23 00:44:15,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:15,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288562242] [2020-12-23 00:44:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:15,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288562242] [2020-12-23 00:44:15,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63235209] [2020-12-23 00:44:15,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:17,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:44:17,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:44:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-12-23 00:44:17,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:17,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:44:17,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443134174] [2020-12-23 00:44:17,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:44:17,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:17,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:44:17,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:44:17,431 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2020-12-23 00:44:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:17,657 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-12-23 00:44:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:44:17,658 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2020-12-23 00:44:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:17,659 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:44:17,659 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:44:17,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:44:17,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:44:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-12-23 00:44:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:44:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-12-23 00:44:17,665 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2020-12-23 00:44:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:17,665 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-12-23 00:44:17,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:44:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-12-23 00:44:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:44:17,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:17,667 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:17,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:44:17,881 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:17,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2020-12-23 00:44:17,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:17,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762244711] [2020-12-23 00:44:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:18,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762244711] [2020-12-23 00:44:18,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363970451] [2020-12-23 00:44:18,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:44:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:18,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:18,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:44:18,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476986922] [2020-12-23 00:44:18,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:18,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:18,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:18,408 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2020-12-23 00:44:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:18,484 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-12-23 00:44:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:44:18,485 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-12-23 00:44:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:18,486 INFO L225 Difference]: With dead ends: 164 [2020-12-23 00:44:18,486 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:44:18,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:44:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:44:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:44:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 00:44:18,492 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2020-12-23 00:44:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:18,492 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 00:44:18,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 00:44:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:44:18,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:18,493 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:18,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:44:18,708 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2020-12-23 00:44:18,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:18,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054403186] [2020-12-23 00:44:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:19,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054403186] [2020-12-23 00:44:19,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962295650] [2020-12-23 00:44:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:19,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:19,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:19,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:44:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:19,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:19,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:44:19,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321114643] [2020-12-23 00:44:19,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:44:19,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:19,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:44:19,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:44:19,261 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-12-23 00:44:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:19,344 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2020-12-23 00:44:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:19,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-12-23 00:44:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:19,345 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:44:19,345 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:44:19,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:44:19,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:44:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 00:44:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:44:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-23 00:44:19,350 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2020-12-23 00:44:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:19,351 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-23 00:44:19,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:44:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-23 00:44:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:44:19,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:19,352 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:19,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:19,566 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2020-12-23 00:44:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:19,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577439203] [2020-12-23 00:44:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:19,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577439203] [2020-12-23 00:44:19,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761869130] [2020-12-23 00:44:19,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:20,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:44:20,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:44:20,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-12-23 00:44:20,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:20,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:44:20,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619911567] [2020-12-23 00:44:20,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:44:20,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:20,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:44:20,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:20,404 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2020-12-23 00:44:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:20,542 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-12-23 00:44:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:44:20,542 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2020-12-23 00:44:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:20,543 INFO L225 Difference]: With dead ends: 171 [2020-12-23 00:44:20,543 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:44:20,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:44:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-12-23 00:44:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:44:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-23 00:44:20,549 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2020-12-23 00:44:20,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:20,549 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-23 00:44:20,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:44:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-23 00:44:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:44:20,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:20,551 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:20,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:44:20,765 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2020-12-23 00:44:20,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:20,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919537869] [2020-12-23 00:44:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:44:21,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919537869] [2020-12-23 00:44:21,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899019238] [2020-12-23 00:44:21,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:21,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:21,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-12-23 00:44:21,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:21,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2020-12-23 00:44:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096736182] [2020-12-23 00:44:21,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:44:21,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:44:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:21,517 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2020-12-23 00:44:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:21,647 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-12-23 00:44:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:44:21,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2020-12-23 00:44:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:21,649 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:44:21,649 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 00:44:21,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 00:44:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-12-23 00:44:21,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 00:44:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-12-23 00:44:21,655 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2020-12-23 00:44:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:21,655 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-12-23 00:44:21,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:44:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-12-23 00:44:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:44:21,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:21,657 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:21,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:21,872 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:21,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:21,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2020-12-23 00:44:21,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:21,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051213865] [2020-12-23 00:44:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-23 00:44:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051213865] [2020-12-23 00:44:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478133597] [2020-12-23 00:44:22,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:26,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:44:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-23 00:44:26,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:26,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:44:26,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963372464] [2020-12-23 00:44:26,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:44:26,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:44:26,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:44:26,760 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2020-12-23 00:44:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:27,049 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-12-23 00:44:27,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:44:27,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2020-12-23 00:44:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:27,051 INFO L225 Difference]: With dead ends: 189 [2020-12-23 00:44:27,051 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:44:27,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:44:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:44:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-12-23 00:44:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:44:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-23 00:44:27,057 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2020-12-23 00:44:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:27,057 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-23 00:44:27,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:44:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-23 00:44:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:44:27,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:27,058 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:27,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:44:27,273 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2020-12-23 00:44:27,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:27,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87061943] [2020-12-23 00:44:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 00:44:27,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87061943] [2020-12-23 00:44:27,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037365265] [2020-12-23 00:44:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:29,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:44:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:29,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:44:29,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:29,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-23 00:44:29,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13324410] [2020-12-23 00:44:29,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:44:29,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:44:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:29,484 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2020-12-23 00:44:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:29,706 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-12-23 00:44:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:44:29,707 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2020-12-23 00:44:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:29,708 INFO L225 Difference]: With dead ends: 203 [2020-12-23 00:44:29,708 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 00:44:29,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 00:44:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-12-23 00:44:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:44:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-12-23 00:44:29,714 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2020-12-23 00:44:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:29,714 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-12-23 00:44:29,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:44:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-12-23 00:44:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:44:29,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:29,716 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:29,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:44:29,932 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2020-12-23 00:44:29,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:29,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596276518] [2020-12-23 00:44:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:30,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596276518] [2020-12-23 00:44:30,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368379115] [2020-12-23 00:44:30,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:44:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:30,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:30,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:44:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371256273] [2020-12-23 00:44:30,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:44:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:44:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:44:30,682 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2020-12-23 00:44:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:30,791 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2020-12-23 00:44:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:44:30,791 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2020-12-23 00:44:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:30,793 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:44:30,793 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:44:30,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:44:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:44:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-23 00:44:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 00:44:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-12-23 00:44:30,813 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2020-12-23 00:44:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:30,816 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-12-23 00:44:30,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:44:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-12-23 00:44:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 00:44:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:30,819 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:31,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:44:31,020 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2020-12-23 00:44:31,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:31,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805580428] [2020-12-23 00:44:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:31,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805580428] [2020-12-23 00:44:31,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384390288] [2020-12-23 00:44:31,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:31,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:31,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:31,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:44:31,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:31,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:31,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:44:31,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889056455] [2020-12-23 00:44:31,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:44:31,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:31,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:44:31,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:31,802 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2020-12-23 00:44:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:31,912 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-12-23 00:44:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:44:31,913 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-12-23 00:44:31,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:31,914 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:44:31,914 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:44:31,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:44:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-23 00:44:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:44:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-12-23 00:44:31,920 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2020-12-23 00:44:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:31,920 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-12-23 00:44:31,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:44:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-12-23 00:44:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 00:44:31,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:31,922 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:32,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:44:32,136 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:32,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2020-12-23 00:44:32,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:32,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015168487] [2020-12-23 00:44:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:32,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015168487] [2020-12-23 00:44:32,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121094993] [2020-12-23 00:44:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:33,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:44:33,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:33,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2020-12-23 00:44:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 00:44:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829932782] [2020-12-23 00:44:33,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:44:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:44:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:44:33,685 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2020-12-23 00:44:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:33,895 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2020-12-23 00:44:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:44:33,896 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2020-12-23 00:44:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:33,897 INFO L225 Difference]: With dead ends: 215 [2020-12-23 00:44:33,898 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:44:33,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:44:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:44:33,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-23 00:44:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:44:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-12-23 00:44:33,907 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2020-12-23 00:44:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:33,908 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-12-23 00:44:33,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:44:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-12-23 00:44:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:44:33,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:33,910 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:34,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:34,126 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2020-12-23 00:44:34,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:34,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233989613] [2020-12-23 00:44:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:34,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233989613] [2020-12-23 00:44:34,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908345679] [2020-12-23 00:44:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:34,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:34,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:44:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:35,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:35,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:44:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887161662] [2020-12-23 00:44:35,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:44:35,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:44:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:35,019 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2020-12-23 00:44:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:35,142 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2020-12-23 00:44:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:44:35,143 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2020-12-23 00:44:35,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:35,144 INFO L225 Difference]: With dead ends: 218 [2020-12-23 00:44:35,144 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:44:35,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:44:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:44:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:44:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-12-23 00:44:35,150 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2020-12-23 00:44:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:35,150 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-12-23 00:44:35,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:44:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-12-23 00:44:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:44:35,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:35,152 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:35,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:35,366 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:35,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:35,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2020-12-23 00:44:35,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:35,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057551806] [2020-12-23 00:44:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:36,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057551806] [2020-12-23 00:44:36,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525563512] [2020-12-23 00:44:36,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:48,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 00:44:48,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:44:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2020-12-23 00:44:49,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:49,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2020-12-23 00:44:49,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306161127] [2020-12-23 00:44:49,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:44:49,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:44:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:44:49,117 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2020-12-23 00:44:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:49,341 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-12-23 00:44:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:44:49,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2020-12-23 00:44:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:49,343 INFO L225 Difference]: With dead ends: 223 [2020-12-23 00:44:49,343 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 00:44:49,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:44:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 00:44:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-12-23 00:44:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:44:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-12-23 00:44:49,349 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2020-12-23 00:44:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:49,350 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-12-23 00:44:49,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:44:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-12-23 00:44:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 00:44:49,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:49,351 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:49,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:49,552 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2020-12-23 00:44:49,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:49,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223560739] [2020-12-23 00:44:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-23 00:44:50,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223560739] [2020-12-23 00:44:50,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277809911] [2020-12-23 00:44:50,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:53,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:44:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:44:53,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-12-23 00:44:53,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:53,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2020-12-23 00:44:53,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189263868] [2020-12-23 00:44:53,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:44:53,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:53,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:44:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:44:53,602 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 41 states. [2020-12-23 00:44:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:54,009 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2020-12-23 00:44:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:44:54,009 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2020-12-23 00:44:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:54,010 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:44:54,011 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:44:54,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:44:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:44:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-12-23 00:44:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:44:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-12-23 00:44:54,017 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2020-12-23 00:44:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:54,018 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-12-23 00:44:54,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:44:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-12-23 00:44:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 00:44:54,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:54,019 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:54,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:44:54,232 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 31 times [2020-12-23 00:44:54,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:54,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742047249] [2020-12-23 00:44:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:54,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742047249] [2020-12-23 00:44:54,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812240211] [2020-12-23 00:44:54,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:44:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:55,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:55,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:44:55,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908212165] [2020-12-23 00:44:55,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:44:55,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:44:55,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:55,257 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2020-12-23 00:44:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:55,386 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-12-23 00:44:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:44:55,392 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-12-23 00:44:55,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:55,393 INFO L225 Difference]: With dead ends: 240 [2020-12-23 00:44:55,393 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 00:44:55,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 00:44:55,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-12-23 00:44:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 00:44:55,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-12-23 00:44:55,398 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2020-12-23 00:44:55,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:55,399 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-12-23 00:44:55,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:44:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-12-23 00:44:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:44:55,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:55,400 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:55,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:55,614 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 32 times [2020-12-23 00:44:55,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:55,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585095867] [2020-12-23 00:44:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:56,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585095867] [2020-12-23 00:44:56,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196973064] [2020-12-23 00:44:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:56,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:56,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:56,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:44:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:56,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:56,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:44:56,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897444329] [2020-12-23 00:44:56,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:44:56,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:44:56,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:44:56,629 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2020-12-23 00:44:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:56,788 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-12-23 00:44:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:44:56,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2020-12-23 00:44:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:56,790 INFO L225 Difference]: With dead ends: 242 [2020-12-23 00:44:56,790 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:44:56,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:44:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:44:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-12-23 00:44:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 00:44:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-12-23 00:44:56,796 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2020-12-23 00:44:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:56,796 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-12-23 00:44:56,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:44:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-12-23 00:44:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:44:56,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:56,797 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:57,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:44:57,011 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 33 times [2020-12-23 00:44:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:57,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879889614] [2020-12-23 00:44:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:44:57,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879889614] [2020-12-23 00:44:57,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61075136] [2020-12-23 00:44:57,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:58,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:44:58,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:44:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2020-12-23 00:44:59,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:59,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 12] total 45 [2020-12-23 00:44:59,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766166213] [2020-12-23 00:44:59,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:44:59,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:59,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:44:59,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:44:59,066 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2020-12-23 00:44:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:59,501 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2020-12-23 00:44:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:44:59,502 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2020-12-23 00:44:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:59,503 INFO L225 Difference]: With dead ends: 253 [2020-12-23 00:44:59,503 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:44:59,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:44:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:44:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-12-23 00:44:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:44:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-12-23 00:44:59,509 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2020-12-23 00:44:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:59,509 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-12-23 00:44:59,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:44:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-12-23 00:44:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:44:59,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:59,510 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:59,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:59,726 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 34 times [2020-12-23 00:44:59,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:59,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674225032] [2020-12-23 00:44:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-23 00:45:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674225032] [2020-12-23 00:45:00,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628149445] [2020-12-23 00:45:00,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:00,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:45:00,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:00,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:45:00,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2020-12-23 00:45:01,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:01,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2020-12-23 00:45:01,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222117439] [2020-12-23 00:45:01,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:45:01,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:01,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:45:01,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:45:01,241 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2020-12-23 00:45:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:01,548 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2020-12-23 00:45:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:45:01,548 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2020-12-23 00:45:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:01,550 INFO L225 Difference]: With dead ends: 267 [2020-12-23 00:45:01,550 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:45:01,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:45:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:45:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-12-23 00:45:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 00:45:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-12-23 00:45:01,556 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2020-12-23 00:45:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:01,556 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-12-23 00:45:01,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:45:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-12-23 00:45:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 00:45:01,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:01,558 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:01,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:45:01,773 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:01,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:01,773 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 35 times [2020-12-23 00:45:01,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:01,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367095337] [2020-12-23 00:45:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-12-23 00:45:02,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367095337] [2020-12-23 00:45:02,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115410161] [2020-12-23 00:45:02,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:11,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 00:46:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:11,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:46:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2020-12-23 00:46:12,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:12,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2020-12-23 00:46:12,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097326662] [2020-12-23 00:46:12,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:46:12,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:46:12,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:46:12,587 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 49 states. [2020-12-23 00:46:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:13,080 INFO L93 Difference]: Finished difference Result 281 states and 292 transitions. [2020-12-23 00:46:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 00:46:13,081 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-12-23 00:46:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:13,082 INFO L225 Difference]: With dead ends: 281 [2020-12-23 00:46:13,082 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 00:46:13,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:46:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 00:46:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2020-12-23 00:46:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 00:46:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-12-23 00:46:13,089 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2020-12-23 00:46:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:13,089 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-12-23 00:46:13,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:46:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-12-23 00:46:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-23 00:46:13,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:13,090 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:13,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:46:13,304 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1809286964, now seen corresponding path program 36 times [2020-12-23 00:46:13,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:13,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249198568] [2020-12-23 00:46:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-12-23 00:46:14,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249198568] [2020-12-23 00:46:14,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645500619] [2020-12-23 00:46:14,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:18,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:46:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:46:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2020-12-23 00:46:19,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:19,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2020-12-23 00:46:19,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640523807] [2020-12-23 00:46:19,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:46:19,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:19,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:46:19,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:46:19,178 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 48 states. [2020-12-23 00:46:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:19,476 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2020-12-23 00:46:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:46:19,477 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 177 [2020-12-23 00:46:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:19,478 INFO L225 Difference]: With dead ends: 289 [2020-12-23 00:46:19,478 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 00:46:19,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:46:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 00:46:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-12-23 00:46:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 00:46:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-12-23 00:46:19,485 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2020-12-23 00:46:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:19,485 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-12-23 00:46:19,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:46:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-12-23 00:46:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 00:46:19,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:19,486 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:19,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:46:19,701 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1693026416, now seen corresponding path program 37 times [2020-12-23 00:46:19,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:19,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476976568] [2020-12-23 00:46:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:20,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476976568] [2020-12-23 00:46:20,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655902617] [2020-12-23 00:46:20,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:46:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:21,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:21,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:46:21,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221211322] [2020-12-23 00:46:21,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:46:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:46:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:46:21,037 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 40 states. [2020-12-23 00:46:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:21,223 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2020-12-23 00:46:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:46:21,223 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 181 [2020-12-23 00:46:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:21,224 INFO L225 Difference]: With dead ends: 292 [2020-12-23 00:46:21,224 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 00:46:21,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:46:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 00:46:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-12-23 00:46:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 00:46:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-12-23 00:46:21,229 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2020-12-23 00:46:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:21,229 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-12-23 00:46:21,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:46:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-12-23 00:46:21,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 00:46:21,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:21,230 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:21,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:46:21,431 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:21,432 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 38 times [2020-12-23 00:46:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:21,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595821126] [2020-12-23 00:46:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:22,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595821126] [2020-12-23 00:46:22,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900732189] [2020-12-23 00:46:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:22,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:46:22,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:22,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:46:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:22,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:22,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:46:22,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646840655] [2020-12-23 00:46:22,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:46:22,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:46:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:46:22,915 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 41 states. [2020-12-23 00:46:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:23,058 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2020-12-23 00:46:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:46:23,065 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2020-12-23 00:46:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:23,066 INFO L225 Difference]: With dead ends: 294 [2020-12-23 00:46:23,067 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:46:23,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:46:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:46:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-12-23 00:46:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:46:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-12-23 00:46:23,078 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2020-12-23 00:46:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:23,078 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-12-23 00:46:23,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:46:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-12-23 00:46:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 00:46:23,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:23,081 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:23,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:23,295 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 39 times [2020-12-23 00:46:23,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:23,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454442152] [2020-12-23 00:46:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:24,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454442152] [2020-12-23 00:46:24,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740176387] [2020-12-23 00:46:24,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:25,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:46:25,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:25,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:46:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-12-23 00:46:25,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:25,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2020-12-23 00:46:25,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144074571] [2020-12-23 00:46:25,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:46:25,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:25,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:46:25,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:46:25,989 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2020-12-23 00:46:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:26,301 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2020-12-23 00:46:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:46:26,302 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2020-12-23 00:46:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:26,303 INFO L225 Difference]: With dead ends: 299 [2020-12-23 00:46:26,303 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 00:46:26,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:46:26,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 00:46:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-12-23 00:46:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 00:46:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-12-23 00:46:26,309 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2020-12-23 00:46:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:26,310 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-12-23 00:46:26,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:46:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-12-23 00:46:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-23 00:46:26,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:26,311 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:26,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 00:46:26,527 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 40 times [2020-12-23 00:46:26,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:26,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499385045] [2020-12-23 00:46:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:46:27,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499385045] [2020-12-23 00:46:27,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061442908] [2020-12-23 00:46:27,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:27,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:46:27,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:46:27,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2020-12-23 00:46:28,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:28,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2020-12-23 00:46:28,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806787554] [2020-12-23 00:46:28,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 00:46:28,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 00:46:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:46:28,465 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 54 states. [2020-12-23 00:46:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:28,750 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2020-12-23 00:46:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 00:46:28,751 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2020-12-23 00:46:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:28,753 INFO L225 Difference]: With dead ends: 305 [2020-12-23 00:46:28,753 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 00:46:28,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:46:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 00:46:28,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-12-23 00:46:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 00:46:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-12-23 00:46:28,760 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2020-12-23 00:46:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:28,760 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-12-23 00:46:28,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 00:46:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-12-23 00:46:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-23 00:46:28,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:28,761 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:28,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:28,975 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 41 times [2020-12-23 00:46:28,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:28,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762766696] [2020-12-23 00:46:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:46:30,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762766696] [2020-12-23 00:46:30,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681997992] [2020-12-23 00:46:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true